signal.h revision 75ef63d6cf83787233d1c45489c4ec03b0a67d16 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _SIGNAL_H_
30#define _SIGNAL_H_
31
32#include <asm/sigcontext.h>
33#include <errno.h>
34#include <limits.h>
35#include <machine/pthread_types.h>
36#include <string.h>
37#include <sys/cdefs.h>
38#include <sys/types.h>
39
40#if defined(__LP64__) || defined(__mips__)
41/* For 64-bit (and mips), the kernel's struct sigaction doesn't match the POSIX one,
42 * so we need to expose our own and translate behind the scenes. */
43#  define sigaction __kernel_sigaction
44#  include <linux/signal.h>
45#  undef sigaction
46#else
47/* For 32-bit, we're stuck with the definitions we already shipped,
48 * even though they contain a sigset_t that's too small. */
49#  include <linux/signal.h>
50#endif
51
52#include <sys/ucontext.h>
53#define __BIONIC_HAVE_UCONTEXT_T
54
55__BEGIN_DECLS
56
57typedef int sig_atomic_t;
58
59/* The arm and x86 kernel header files don't define _NSIG. */
60#ifndef _KERNEL__NSIG
61#define _KERNEL__NSIG 64
62#endif
63
64/* Userspace's NSIG is the kernel's _NSIG + 1. */
65#define _NSIG (_KERNEL__NSIG + 1)
66#define NSIG _NSIG
67
68/* We take a few real-time signals for ourselves. May as well use the same names as glibc. */
69#define SIGRTMIN (__libc_current_sigrtmin())
70#define SIGRTMAX (__libc_current_sigrtmax())
71extern int __libc_current_sigrtmin(void);
72extern int __libc_current_sigrtmax(void);
73
74extern const char* const sys_siglist[];
75extern const char* const sys_signame[]; /* BSD compatibility. */
76
77typedef __sighandler_t sig_t; /* BSD compatibility. */
78typedef __sighandler_t sighandler_t; /* glibc compatibility. */
79
80#define si_timerid si_tid /* glibc compatibility. */
81
82#if defined(__LP64__)
83
84struct sigaction {
85  unsigned int sa_flags;
86  union {
87    sighandler_t sa_handler;
88    void (*sa_sigaction)(int, struct siginfo*, void*);
89  };
90  sigset_t sa_mask;
91  void (*sa_restorer)(void);
92};
93
94#elif defined(__mips__)
95
96struct sigaction {
97  unsigned int sa_flags;
98  union {
99    sighandler_t sa_handler;
100    void (*sa_sigaction) (int, struct siginfo*, void*);
101  };
102  sigset_t sa_mask;
103};
104
105#endif
106
107extern int sigaction(int, const struct sigaction*, struct sigaction*);
108
109extern sighandler_t signal(int, sighandler_t);
110
111extern int siginterrupt(int, int);
112
113extern int sigaddset(sigset_t*, int);
114extern int sigdelset(sigset_t*, int);
115extern int sigemptyset(sigset_t*);
116extern int sigfillset(sigset_t*);
117extern int sigismember(const sigset_t*, int);
118
119extern int sigpending(sigset_t*) __nonnull((1));
120extern int sigprocmask(int, const sigset_t*, sigset_t*);
121extern int sigsuspend(const sigset_t*) __nonnull((1));
122extern int sigwait(const sigset_t*, int*) __nonnull((1, 2));
123
124extern int raise(int);
125extern int kill(pid_t, int);
126extern int killpg(int, int);
127
128extern int sigaltstack(const stack_t*, stack_t*);
129
130extern void psiginfo(const siginfo_t*, const char*);
131extern void psignal(int, const char*);
132
133extern int pthread_kill(pthread_t, int);
134extern int pthread_sigmask(int, const sigset_t*, sigset_t*);
135
136__END_DECLS
137
138#endif /* _SIGNAL_H_ */
139